Trait libpijul_compat::Transaction

pub trait Transaction: SkipList {
    fn iter<K, V>(
        &'a self, 
        db: &'a Db<K, V>, 
        key: Option<(K, Option<V>)>
    ) -> Cursor<'a, Self, K, V>
    where
        K: Representable,
        V: Representable,
    { ... }
    fn rev_iter<K, V>(
        &'a self, 
        db: &'a Db<K, V>, 
        key: Option<(K, Option<V>)>
    ) -> RevCursor<'a, Self, K, V>
    where
        K: Representable,
        V: Representable,
    { ... }
    fn root<K, V>(&mut self, root: usize) -> Option<Db<K, V>>
    where
        K: Representable,
        V: Representable,
    { ... }
    fn get<K, V>(
        &'a self, 
        root: &Db<K, V>, 
        key: K, 
        value: Option<V>
    ) -> Option<V>
    where
        K: Representable,
        V: Representable,
    { ... }
}

Trait for operations common to mutable and immutable transactions.

Provided Methods

fn iter<K, V>(
    &'a self,
    db: &'a Db<K, V>,
    key: Option<(K, Option<V>)>
) -> Cursor<'a, Self, K, V> where
    K: Representable,
    V: Representable, 

Iterate over a database, starting at the first value larger than or equal to (key, value) (and at the smallest key, or smallest value if one or both of them is None).

fn rev_iter<K, V>(
    &'a self,
    db: &'a Db<K, V>,
    key: Option<(K, Option<V>)>
) -> RevCursor<'a, Self, K, V> where
    K: Representable,
    V: Representable, 

Iterate over a database in the reverse order, starting from the last binding strictly before k (or from the last binding in the table if k.is_none()).

fn root<K, V>(&mut self, root: usize) -> Option<Db<K, V>> where
    K: Representable,
    V: Representable, 

Gets the specified root. At most 508 different roots are allowed.

fn get<K, V>(&'a self, root: &Db<K, V>, key: K, value: Option<V>) -> Option<V> where
    K: Representable,
    V: Representable, 

Get the smallest value associated to key, or returns the given binding if value is Some(..) and is associated to key in the given database.

Implementations on Foreign Types

impl<'env> Transaction for Txn<'env>

fn iter<K, V>(
    &'a self,
    db: &'a Db<K, V>,
    key: Option<(K, Option<V>)>
) -> Cursor<'a, Self, K, V> where
    K: Representable,
    V: Representable, 

fn rev_iter<K, V>(
    &'a self,
    db: &'a Db<K, V>,
    key: Option<(K, Option<V>)>
) -> RevCursor<'a, Self, K, V> where
    K: Representable,
    V: Representable, 

fn root<K, V>(&mut self, root: usize) -> Option<Db<K, V>> where
    K: Representable,
    V: Representable, 

fn get<K, V>(&'a self, root: &Db<K, V>, key: K, value: Option<V>) -> Option<V> where
    K: Representable,
    V: Representable, 

impl<'env, T> Transaction for MutTxn<'env, T>

fn iter<K, V>(
    &'a self,
    db: &'a Db<K, V>,
    key: Option<(K, Option<V>)>
) -> Cursor<'a, Self, K, V> where
    K: Representable,
    V: Representable, 

fn rev_iter<K, V>(
    &'a self,
    db: &'a Db<K, V>,
    key: Option<(K, Option<V>)>
) -> RevCursor<'a, Self, K, V> where
    K: Representable,
    V: Representable, 

fn root<K, V>(&mut self, root: usize) -> Option<Db<K, V>> where
    K: Representable,
    V: Representable, 

fn get<K, V>(&'a self, root: &Db<K, V>, key: K, value: Option<V>) -> Option<V> where
    K: Representable,
    V: Representable, 

Implementors